Added connector id to valid connector ids json

.script/tests/detectionTemplateSchemaValidation/ValidConnectorIds.json

@@ -79,6 +79,7 @@
   "QualysVulnerabilityManagement",
   "SalesforceServiceCloud",
   "SecurityEvents",
+  "SlackAuditAPI",
   "SonicWallFirewall",
   "SophosCloudOptix",
   "SophosXGFirewall",